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This is a maintenance release to fix the book reading issue reported by some users. As an added benefit, Jim’s build should be now a little faster on Intel CPU (4% on 64-bit and almost 6% on 32-bit).This is a non functional change release so there is no need to retest Stockfish for people who have already done so; for people who still to test we suggest to use this one because it should be a bit faster on Intel hardware.

New compile of stockfish 2.1.1 JALinux 64 bit should be a bit faster than previous compilesWindows 64 bit version will now run correctly for users using Linux 64 bit Winehttp://cl.ly/3E1a1r0v1W1D1W1M3k3T/stockfish-211-ja.ziphttp://www.mediafire.com/?e8op18qiaam76sd

@mcdiniz wrote:hi, ahmed ... is that you could make the new setting for stockfish 2.1.1 X.. so that we can do some testing? big hug

Mobility (Middle Game) = 90Passed Pawns (Middle Game) = 90these settings are better than the default and good for Middle game, but there is no significant influence in the End gamehope this be helpful for stockfish authors. good luck

@mcdiniz wrote:hi, ahmed ... is that you could make the new setting for stockfish 2.1.1 X.. so that we can do some testing? big hug

Mobility (Middle Game) = 90Passed Pawns (Middle Game) = 90these settings are better than the default and good for Middle game, but there is no significant influence in the End gamehope this be helpful for stockfish authors. good luck

Here is a single "fun" game between SF 2.1.1/PHQ and Rybka 4.1If you like heavy tactics , this is nice.... At 15... R= + .40 , and had turned around SF supposed OB + ..... Then at 18 SF sacs his N , (in a Tal like move where the knights only move forward) , to press the attack , even though by 20. SF = -1.41 ..... SF continues to press the attack a piece down , and proceeds with a crushing win....... 31....Qb8 didn't seem to help Rybka much....after a 10 min / 4 core analysis , reg SF won't play 18. Ncd5 !

** after further review , 18.Ncd5 ? was mostly a factor of time/depth . In inf analysis , SF/PHQ switches away from this move , and after 10 mins shows 18. Qh3 = -.96.... Still , a fun game . I wonder if humans could have defended better than Rybka did ??